Flame retardant poly(siloxane) copolymer compositions, methods of manufacture, and articles formed therefrom

a polycarbonate and composition technology, applied in the field of polymer compositions, can solve the problems of difficult formulation, limited set of polycarbonates used in aircraft and other directions, and achieve the effect of reducing the number of polycarbonates
US20120251750A1Active Publication Date: 2012-10-04SHPP GLOBAL TECH BV
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SHPP GLOBAL TECH BV
Publication Date
2012-10-04

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Abstract

A poly(siloxane) copolymer composition comprising: a first polymer comprising a first repeating unit, and a poly(siloxane) block unit, a second polymer different from the first polymer and comprising of bromine; and optionally, one or more third polymers different from the first polymer and second polymer; wherein siloxane units are present in the composition in an amount of at least 0.3 wt %, and bromine is present in the composition in an amount of at least 7.8 wt %, each based on the sum of the wt % of the first, second, and optional one or more third polymers; and further wherein an article molded from the composition has an OSU integrated 2 minute heat release test value of less than 65 kW-min / m2 and a peak heat release rate of less than 65 kW / m2, and an E662 smoke test Dmax value of less than 200.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is a continuation-in-part of U.S. patent application Ser. No. 13 / 207,930, filed Aug. 11, 2011, which claims priority to India Patent Application No. 920 / DEL / 2011, filed Mar. 31, 2011, the contents of both applications being incorporated by reference herein in their entirety.BACKGROUND OF THE INVENTION

[0002] This disclosure generally relates to polymer compositions, and more particularly to flame retardant poly(siloxane) copolymer compositions containing specific combinations of siloxane block copolymers.

[0003] Flame retardant (FR) polymers and polymer blends, for example polycarbonates and polycarbonate blends with UL V0 and 5V A and B Underwriters Laboratories flammability ratings are widely prepared and used, especially in a wide variety of electrical and electronic applications. Conversely, only a very limited set of polycarbonates are used in aircraft and other transportation applications particularly interior parts such...

Claims

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